Facile Preparation of Oxygen-Vacancy-Engineered MoOx Nanostructures for Photoreversible Switching Systems

Photochromic materials have attracted increasing attention. Here, we report a novel photo-reversible color switching system based on oxygen-vacancy-engineered MoOx nanostructures with water/N-methyl-2-pyrrolidone (NMP) as solvents. In this work, the system rapidly changed from colorless to blue unde...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2021-11, Vol.11 (12), p.3192
Main Authors: Xu, Hao, Zhang, Liangjing, Wang, Aiwu, Hou, Juan, Guo, Xuhong
Format: Article
Language:English
Subjects:
Color
color switching
Irradiation
Ligands
Light
Light irradiation
MoOx nanostructures
N-Methyl-2-pyrrolidone
Nanoparticles
Nanostructure
Oxygen
photochromic
Photochromism
Quantum dots
Solvents
Spectrum analysis
Stability
Switching
Ultraviolet radiation
UV light
Vacancies
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Summary:Photochromic materials have attracted increasing attention. Here, we report a novel photo-reversible color switching system based on oxygen-vacancy-engineered MoOx nanostructures with water/N-methyl-2-pyrrolidone (NMP) as solvents. In this work, the system rapidly changed from colorless to blue under UV irradiation (360–400 nm) and slowly recovered its colorless state under visible light irradiation. The obtained oxygen vacancy-engineered MoOx nanostructures exhibited good repeatability, chemical stability, and cycling stability. Upon UV light irradiation, H+ was intercalated into layered MoOx nanostructures and the Mo6+ concentration in the HxMoOx decreased, while the Mo5+ concentration increased and increased oxygen vacancies changed the color to blue. Then, it recovered its original color slowly without UV light irradiation. What is more, the system was highly sensitive to UV light even on cloudy days. Compared with other reported photochromic materials, the system in this study has the advantage of facile preparation and provides new insights for the development of photochromic materials without dyes.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano11123192